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Wiring 1982 Heritage Special with m.unit Blue

Discussion in 'The Garage' started by SolidSenpai, Apr 2, 2018.

  1. SolidSenpai

    SolidSenpai XS400 New Member

    Boy howdy, I'm new to the forum and have been doing some work on my XS for the past 6 months or so on and off, it's only now that I have something I'd like some feedback on. I'm doing a sort of tracker build on my bike and will be replacing the majority of the stock electrical components with a motogadget m.unit blue (https://revivalcycles.com/products/motogadget-m-unit-blue), pretty neat piece of tech, although quite pricey. In order to install the m.unit, i'm making a wiring harness from scratch and so I've drawn up a wiring diagram which I'm hoping is all in order, I'd like some feedback on it in case I've missed anything or could improve it. I'm hoping it's straightforward enough without a legend, pardon the quality I used a mouse to draw it.
    Also, here's some more info on the m.unit (https://motogadget.com/shop/media/downloads/manual/munit_blue_manual_1.8_en.pdf)

    Some other details of my build:
    -Kickstart only, removed starter motor/chain and solenoid/relay
    -Antigravity 4 cell battery
    -Mikesxs regulator/rectifier
    -Drag specialties speedometer/tachometer
    -LED signals, head/taillight, plate lights etc.
    -Lock: I'll be using the bluetooth locking method and a disc lock
    -mikesxs pwk carb
    -Stock handlebar controls

    Cheers, hope this thread can be useful to others wiring an m.unit.

    Attached Files:

  2. spectra

    spectra XS400 Junkie

    I am by no means an electrical person but was able to wire my last project with the older M unit. I used the little M button inside the bars and it made things easy. Only one wire back to the unit to control the lights, blinkers, horn and starter.
  3. Timothy Kelly

    Timothy Kelly check_kelly

    I’ll be keeping an eye on this because I’m using the M-unit Blue as well. I couldn’t figure out how to wire up the Ignition Output, looks like I have it right according to your diagram. My issue is that I’m still using the starter solenoid and don’t know what to do with the red/white wire from it! Got any pics of the bike so far?
  4. Jeff0133

    Jeff0133 XS400 Junkie

    Feels like R/W should go from finition output to coils then back To tci.
  5. Jeff0133

    Jeff0133 XS400 Junkie

    ..oh and dont forget to ground the tci
  6. Myke Nytemare

    Myke Nytemare XS400 Enthusiast

    I would be curious as to how this turned out as I bought an M unit almost two years ago and moving twice and family obligations I never got around to finishing my bike. It's sitting in the garage with all of the lights and controls working but I never got the ignition hooked up properly and could definitely use help.
  7. spectra

    spectra XS400 Junkie

    What year is your bike? What help are you after?

    I wired my 78 with a M unit and wasnt bad at all.
  8. Myke Nytemare

    Myke Nytemare XS400 Enthusiast

    It's a 77 400D.I'm all good with the lights and everything that's straightforward...and I even removed the electric start along with the clutch and chain on starter motor to go kickstart only. It's just with the coils (disconnected from the original harness) and the other ignition related wiring (to the engine/plugs) and only the 2 wire in/out "Start" on the M unit I'm kind of unsure how to continue...and wondering if I should buy a Pamco to make life easier. Any help would be great as I have no hope of riding this summer if I can't finish as space/funds/family won't allow me to purchase another bike.

    Thanks in advance Spectra,

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